Light
a range of energy made of waves that differ in frequencies
Electromagnetic spectrum
the part of the spectrum that humans can see
Visible light
theses waves pass through matter more easily (x-ray)
High frequency / High energy
Which light waves are not visible Which light waves are not visible? Radio waves Microwaves Gamma Rays Ultraviolet Rays
None of these are visible
a wave in which the vibration of energy is across the direction forming an S shape
transverse
this is how light waves are different from sound waves
Light does not need a medium
Why can we see light in outer space?
Light does not need a medium
three things that can happen when light hits an object
Pass through Reflect Absorb
These absorb more light
Dark colors
the bouncing of light from a surface
reflection
these surfaces scatter light
uneven
these surfaces reflect light in a predictable pattern
smooth
the bending of light as it moves from one material to another, such as from air to water
refraction
Why does a part of a pencil under water look broken?
The light changes speed as it moves through air, then glass, then water
materials that allow some light to pass through, but also scatter some of the light (frosted light bulb)
translucent
Materials that allow all light to pass through
transparent
absorbs or reflects all the light that strikes it (metal)
opaque
an object that can change the direction of a light, causing the colors to separate as they leave it
prism
something that is this color reflects red light waves and absorbs the other colors
red
this color reflects all the colors in the light
white
this color absorbs all the light waves
black
When a rainbow forms, this is the prism
raindrops
What is a name that can help you remember the colors in a rainbow, in order?
Roy G. Biv Red, Orange, Yellow, Green, Blue, Indigo, Violet
this color bends the least
red
this color bends the most
violet
curved, transparent object that refracts light
lens
lens that is thicker in the middle, which makes light waves come together and makes objects appear larger and sometimes upside down
Crosses and makes an X Convex lens
lens that is thicker at the edges, which makes the light waves spread out and makes objects appear smaller and always upright
Light goes in the cave Concave lens
Why does an image flip upside down in a convex lens?
The light rays cross.
Light moves through which part of a lens Thicker part or Thinner part
this part of your eye is a convex lens
lens
this is what a person’s vision is when their eyeball is too long
nearsighted
this is what a person’s vision is when their eyeball is too short
farsighted
What causes eyeballs to change shape?
Muscle movement
Why does white light look like a rainbow when it passes through a prism?
The prism separates the component colors.
Through which does light travel the fastest? Air Glass Water
Air
A convex lens makes things look Bigger Or Smaller
Bigger
What reflects the most color Red Or White
White
A concave lens makes things look Bigger Or Smaller
smaller
How do light waves travel? Straighter Or More wavy
Straighter
What travels faster? Light Or Sound
Light
Why does light travel faster than sound?
Light does not disturb molecules or compress them.
What does light carry?
energy
How long does it take for sunlight to reach the earth?
8 minutes